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ADM6346-44ARTZ-R7

P1-P3P4-P6P7-P9P10-P12
Data Sheet ADM6326/ADM6328/ADM6346/ADM6348
THEORY OF OPERATION
The ADM6326/ADM6328/ADM6346/ADM6348 are designed
to protect the integrity of a system’s operation by ensuring the
proper operation of the system during power-up, power-down,
and brownout conditions. Ultralow supply currents make these
devices particularly suitable for use in low power, portable
equipment.
RESET OUTPUT
The ADM6326 and ADM6346 have an active low, push-pull
reset output, whereas the ADM6328 and ADM6348 have an
active low, open-drain reset output, which requires an external
pull-up resistor. The
RESET
signal is guaranteed to be valid for
V
CC
down to 1 V.
When the ADM6326/ADM6328/ADM6346/ADM6348 are
powered up, the
RESET
output remains low for a period typically
equal to the
RESET
active timeout period of 185 ms. This feature
allows adequate time for the system to power up correctly and
for the power supply to stabilize before any devices are brought out
of reset and are allowed to begin executing instructions. Initializing
a system in this way provides a more reliable startup for micro-
processor systems.
When the monitored voltage falls below its associated threshold
(V
TH
),
RESET
is asserted within 20 μs (typical). Asserting
RESET
this quickly means that the entire system can be reset at once
before any part of the system’s voltage falls below its recommended
operating voltage. This system reset can avoid dangerous and/or
erroneous operation of a microprocessor based system.
INTERFACING TO OTHER DEVICES
The active low, open-drain reset output of the ADM6328 and
ADM6348 makes these devices ideal for integration with devices
such as microprocessors with bidirectional reset pins. Simply
connect the
RESET
output of the ADM6328 or ADM6348 to
the
RESET
input of the microprocessor using a single pull-up
resistor to allow either device to initiate a system reset (see
Figure 8).
08052-008
ADM6328/ADM6348
V
CC
V
CC
GND
RESET
MICROPROCESSOR
SYSTEM
V
CC
GND
R
PULL-UP
RESET
INPUT
Figure 8. Interfacing to a Microprocessor with a Bidirectional Reset Pin
TRANSIENT IMMUNITY
To avoid unnecessary resets caused by fast power supply transients,
the ADM6326/ADM6328/ADM6346/ADM6348 provide glitch
immunity from negative-going V
CC
transients.
Figure 5 shows the
RESET
comparator overdrive (that is, the
maximum magnitude of negative-going pulses with respect to
the typical threshold) vs. the pulse duration without a reset.
08052-009
V
CC
V
CC
V
TH
V
TH
t
RD
t
RP
V
CC
0V
0V
1V
RESET
Figure 9.
RESET
Timing
Rev. A | Page 7 of 12
ADM6326/ADM6328/ADM6346/ADM6348 Data Sheet
OUTLINE DIMENSIONS
3.04
2.90
2.80
COMPLIANT TO JEDEC STANDARDS TO-236-AB
011909-C
1
2
3
SE
ATING
PLANE
2.64
2.10
1.40
1.30
1.20
2.05
1.78
0.100
0.013
1.03
0.89
0.60
0.45
0.51
0.37
1.12
0.89
0.180
0.085
0.25
0.54
REF
GAUGE
PLANE
0.60 MAX
0.30 MIN
1.02
0.95
0.88
Figure 10. 3-Lead Small Outline Transistor Package [SOT-23-3]
(RT-3)
Dimensions shown in millimeters
Rev. A | Page 8 of 12
Data Sheet ADM6326/ADM6328/ADM6346/ADM6348
ORDERING GUIDE
Model
1, 2, 3
Typical Threshold
Voltage (T
A
= 25°C)
RESET
Output
Structure Package Description Package Option Branding
ADM6326-22ARTZ-R7 2.2 V Push-Pull 3-Lead SOT-23 RT-3 LAQ
ADM6326-23ARTZ-R7 2.32 V Push-Pull 3-Lead SOT-23 RT-3 LAR
ADM6326-24ARTZ-R7 2.4 V Push-Pull 3-Lead SOT-23 RT-3 LAS
ADM6326-25ARTZ-R7 2.5 V Push-Pull 3-Lead SOT-23 RT-3 LAT
ADM6326-26ARTZ-R7 2.63 V Push-Pull 3-Lead SOT-23 RT-3 LAU
ADM6326-27ARTZ-R7
2.7 V
Push-Pull
3-Lead SOT-23
RT-3
LAV
ADM6326-28ARTZ-R7 2.8 V Push-Pull 3-Lead SOT-23 RT-3 LAW
ADM6326-29ARTZ-R7 2.93 V Push-Pull 3-Lead SOT-23 RT-3 LAX
ADM6326-30ARTZ-R7 3.0 V Push-Pull 3-Lead SOT-23 RT-3 LAY
ADM6326-31ARTZ-R7 3.08 V Push-Pull 3-Lead SOT-23 RT-3 LAZ
ADM6328-22ARTZ-R7 2.2 V Open-Drain 3-Lead SOT-23 RT-3 LB0
ADM6328-23ARTZ-R7 2.32 V Open-Drain 3-Lead SOT-23 RT-3 LB1
ADM6328-24ARTZ-R7 2.4 V Open-Drain 3-Lead SOT-23 RT-3 LB2
ADM6328-25ARTZ-R7
2.5 V
Open-Drain
3-Lead SOT-23
RT-3
LB3
ADM6328-26ARTZ-R7 2.63 V Open-Drain 3-Lead SOT-23 RT-3 LB4
ADM6328-27ARTZ-R7 2.7 V Open-Drain 3-Lead SOT-23 RT-3 LB5
ADM6328-28ARTZ-R7 2.8 V Open-Drain 3-Lead SOT-23 RT-3 LB6
ADM6328-29ARTZ-R7 2.93 V Open-Drain 3-Lead SOT-23 RT-3 LB7
ADM6328-30ARTZ-R7 3.0 V Open-Drain 3-Lead SOT-23 RT-3 LB8
ADM6328-31ARTZ-R7
3.08 V
Open-Drain
3-Lead SOT-23
RT-3
LB9
ADM6346-33ARTZ-R7 3.3 V Push-Pull 3-Lead SOT-23 RT-3 LBA
ADM6346-34ARTZ-R7 3.4 V Push-Pull 3-Lead SOT-23 RT-3 LBC
ADM6346-35ARTZ-R7 3.5 V Push-Pull 3-Lead SOT-23 RT-3 LBD
ADM6346-36ARTZ-R7 3.6 V Push-Pull 3-Lead SOT-23 RT-3 LBE
ADM6346-37ARTZ-R7 3.7 V Push-Pull 3-Lead SOT-23 RT-3 LBF
ADM6346-38ARTZ-R7 3.8 V Push-Pull 3-Lead SOT-23 RT-3 LBG
ADM6346-39ARTZ-R7 3.9 V Push-Pull 3-Lead SOT-23 RT-3 LBH
ADM6346-40ARTZ-R7
3.0 V
Push-Pull
3-Lead SOT-23
RT-3
LCN
ADM6346-41ARTZ-R7 4.1 V Push-Pull 3-Lead SOT-23 RT-3 LCP
ADM6346-42ARTZ-R7 4.2 V Push-Pull 3-Lead SOT-23 RT-3 LCQ
ADM6346-43ARTZ-R7 4.3 V Push-Pull 3-Lead SOT-23 RT-3 LCR
ADM6346-44ARTZ-R7 4.38 V Push-Pull 3-Lead SOT-23 RT-3 LCS
ADM6346-45ARTZ-R7 4.5 V Push-Pull 3-Lead SOT-23 RT-3 LCT
ADM6346-46ARTZ-R7
4.63 V
Push-Pull
3-Lead SOT-23
RT-3
LCU
ADM6348-33ARTZ-R7 3.3 V Open-Drain 3-Lead SOT-23 RT-3 LCV
ADM6348-34ARTZ-R7
3.4 V
Open-Drain
3-Lead SOT-23
RT-3
LCW
ADM6348-35ARTZ-R7 3.5 V Open-Drain 3-Lead SOT-23 RT-3 LCX
ADM6348-36ARTZ-R7 3.6 V Open-Drain 3-Lead SOT-23 RT-3 LCY
ADM6348-37ARTZ-R7 3.7 V Open-Drain 3-Lead SOT-23 RT-3 LCZ
ADM6348-38ARTZ-R7 3.8 V Open-Drain 3-Lead SOT-23 RT-3 LD0
ADM6348-39ARTZ-R7 3.9 V Open-Drain 3-Lead SOT-23 RT-3 LD1
ADM6348-40ARTZ-R7
3.0 V
Open-Drain
3-Lead SOT-23
RT-3
LD2
ADM6348-41ARTZ-R7 4.1 V Open-Drain 3-Lead SOT-23 RT-3 LD3
ADM6348-42ARTZ-R7 4.2 V Open-Drain 3-Lead SOT-23 RT-3 LD4
ADM6348-43ARTZ-R7 4.3 V Open-Drain 3-Lead SOT-23 RT-3 LD5
ADM6348-44ARTZ-R7 4.38 V Open-Drain 3-Lead SOT-23 RT-3 LD6
ADM6348-45ARTZ-R7 4.5 V Open-Drain 3-Lead SOT-23 RT-3 LD7
ADM6348-46ARTZ-R7
4.63 V
Open-Drain
3-Lead SOT-23
RT-3
LD8
1
Contact sales for the availability of nonstandard models.
2
Z = RoHS Compliant Part.
3
The ADM6326-22ARTZ-R7, the ADM6328-28ARTZ-R7, the ADM6346-33ARTZ-R7, and the ADM6348-46ARTZ-R7 are standard models.
`
Rev. A | Page 9 of 12
P1-P3P4-P6P7-P9P10-P12

ADM6346-44ARTZ-R7

Mfr. #:
Buy ADM6346-44ARTZ-R7
Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits 3-PIN ULTRA-LOW POWER RESET
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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